Pressure-governor.



PATENTED JUNE 2, 1908.

W MOGLAVE PRESSURE GOVERNOR.

APPLICATION FILED MAR. 1s. 190e.

No. 889,712. PATENTED JUNE 2, 1908.

W. Mmmm.

PRESSURE GOVERNOR. vAPPLICATION FILED MAB.. 13, 1906.

Nn. 889,712. I PATENTE) JUNE 2, 1908. W. MGGLAVB. PRBSSUREQGOVBRNOR.

i APPLICATION FILED MAE. 13, 1906.

5 SHEETS-SHEET 3.

coG

No. 889,712. PATENTED JUNE 2, 19(18. W. MOULAVE.

PRESSURE GOVERNOR.

APPLIGATION FILED MAR. 13. 190s'.

' 5 SHEETS-SHEET 4.

. am f z. hw

witnesses PATENTED JUNE 2, 19'08.

w. MOGLAVE.

PRBSSU RE GOVERNQR. PPLIOTION FILED MLB. 13, 1906.

5 SHEETS-SHEET 5.

tion

y boiler heated by said furnace.

" UNITED sTAzrn-srnzrnnr onirica.

WILLIAM MCCLAVE, OF SCRANTON, PENNSYLVANIA, ASSIGNOR TO MCCLAVE-BROOKSCOM- PANY, yOF SCRANTON, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

PRESSURE-eovnaN'oR.-

. Specification of Letters Patent.

Patented June 2, 1908.

Application filed March 13, 1906. Serial No. 305,899.

, 5l State of Pennsylvania, have invented'ceitain new and usefulImprovements lowing to be a full, clear, and exact descrip- 4 of theinvention, such as will enable others skilled in the art to which itappertains to make and use' the same'.

This invention relates to improvements in pressure governors, and moreparticularly to apparatus designed for controlling the condition ofcombustion Within a furnacefor governing the pressure of steam within aThe object in view is the control of the pressure within a boiler, suchcontrol being accomplished by governing the blast or draft of thefurnace employed for heating thev boiler.' This and otherobjects areattained largely bythe employment of the combina'- tion of a steamsupply pi e leading directly or indirectly from a boi er 0r boilers (notillustrated) -to fan engines, steam blowers, etc. (not illustrated)arranged for furnishing forced draft or blast for afurnace, avalveinterposed in the length of -said pipe vfor controlling the HowVwithin the pipe, an electromagnet acting directly upon said valve forgoverning the position o the saine, a gage controlled by the pressure ofthe boiler or boilers being heated by the furnace Whose draftapparatusis operated by the steam supplied through the 'said pipe,` an electricalcircuit, means controlled by said gage for closing said circuit, anelectro-magnet interelectro-magnet actin0l posed in said circuit, and arelay circuit adapted to be closed by said last-mentioned magnet, thesaid relay circuit including the g upon the valve.

The invention further comprises certain other novel constructions,combinations and arrangements of parts as will be hereinafter fullydescribed and claimed.

In the accompanying drawings: Figure 1 is a general partially` insection of a pressure governor embodying the features of the presentinvention. Fig. 2 is a longitudinal, vertical,

view partially in. elevation and.

in Pressure- -l mechanism. Governors; and Ido hereby declare thefolvalve and surroundingparts.

' erably of the balanced tylpe.

van adjusting screw 13,- ada central section through the 'valve,'s0me 0fthe connected parts being shown in elevai tion, part of the solenoidbeing broken away for disclosing interior structure.A F 1g. 3 is adetail view in elevation of the circuit closing Fig. 4 is a topplan viewl l of the l' Fig. 51s aview partially in elevation by numerals, 1,.pipe adapted tofs'upply steam or other suitable agent under pressure, toa `suitable draftlor blast apparatus for afurnace.

interposed infthle'gth of the valvefcasing 2, provided with a va vc 3,prefprovided with a centra stem 4, which extends axially of and projectsbeyond the valve at thereof, one end of said ystein extending throughany suitable packing, casing 3, to a point above the casing, and beingengaged by a retractile spring 5. Any suitable bracket 6 is carried bythe casing 2, and extends beyond the upper 'end of. ythe spring 5, and abolt 7 is supported on the bracket 6, by 'an adjusting nut 8. The nut 8is preferably normally 'retained against movement by any suitablelockvnut 9. y The s ring 5 may have its tensiQn increased or i ecreased'by longitudinal movementof the bolt 7, and in practice I preferablyadjust the bolt 7 for giving the required tension to the spring 5 fornormally maintaining the valve 3 in an open condition. The opposite endofvthe stem 4' projects through a packing vcarried by the lower side ofthe casing 2, and preferably pivotally engages ,the core 10 of asolenoid 1].y The solenoid ll may be of any suitable type, but bypreference consists of the usual Windin'gJZ, surrounding core 10. Core10 is longitudinally movably mountedvwithin the winding and ispreferably substantially one-half the length of thc helix, the othervhalf of the space within the helix, orxwinding l2, being taken up by acore section 10u. The core section 10a is adjustable within the helixand isengaged by pted toinove the said core section longitudinally'within the arranged valvel the valve` ,70 each end carried` by yalinenient andare in line with the longitudispar kupon the pressurecontrolling valve for the reason that so much sparking is produced by'with adjusting means for the core section 10a,

of current in the solcnoic helix.

.sure through pipe 1. The pipe 1S communihelix for increasing ordecreasing the reluctance of the path of the magnetic flux. For I thesake of centralizing the lines of force, a preferably soft iron casting14 incloses the helix or winding 12. yThe solenoid 11 is preferablysupported by brackets 15, fixed and depending from the casing' 2.' Theeposite terminals of the helix 12 are preferablv,v connected with bindingposts.16-16.

j ["ronithe foregoing it will be' observed that when the solenoid 11 isnot supplied with current, the spring will maintain the valve 3 in anopen condition, and when current is supplied to the solenoid the valvewill be moved to a closed condition. The adjusting means shown and.described for varying the tension ofthe spring 5, together makesitpossible to carefully balance the solenoid against the spring, thead'ustment of the core section varying the reluctance vof the path forthe magnetic flux, 'and thereby varying the degree of pull upon the core10. In practice of course, .the solenoid lmust be capable of exer. ing apull on its core 10, equal to approximately twice the pull on the spring5, and, as the parts are in exact Vnal axis of the valve 3,.thesaid-valve will readily lrespond to the solenoid, or to the spring,according to the resence or Vabsence YIn .practice I find thatthesolenoid11. requires a current of su'flicie'ntly high potential forreducing an objectionable amount of king, if the switch employed formaking and breaking the circuit is operated-slowly. The prior-artincludesapparatus involving a gage for moving an electrodeinto contactwith aisecond electrode, but l iind that such a vparatus is undesirablefor use in connection with a solenoid designed -to act directly the slowmaking and breaking of the circuit as to burn and destroy. theelectrodes. t

By the a paratus best seen in Fig. 3*, I obviatetlie o jections abovenoted and eliminate substantially all sparking. The apparatus ispreferably arranged in any suitable cabinet 1.7. A pipe 18 is ein loyedand leads from the boiler being heated) by the furnace whose draftapparatus is supplied with prescates with any ordinary type of pressuregage 19, which gage is supported in position b a block 20, fixed to oneend thereof. The b ock 20 is preferably hollow and constitutes the meansof communication between the. pipe 18 and the gage, the said blockbeingxed to a bracket, not illustrated, which pro* -ectsv from plate 21 andwhich is preferably integral therewith. A bracket 22 is carried by plate21, and pivotally carries a depending arin 23. The arm 23 is preferablyof noninagnetic material, but isa good electrical conductor. The saidarm is, as illustrated, preferably of relatively great length, andnormally hangs in the line of gravitation. Ata comparatively shortdistance from the pivot of the arm 23, said arm is pivotallyengagedbyone end of a sleeve ,24. j The sleeve-24 telescopically incloses a iod25, and carries a A set screw 26, adapted to engage the rod 25 atvarious )oints of longitudinaladjustment of said rodfor locking the i'odagainst movement independently of the' sleeve. The free end of the rod`25 pivotally engages the free end fof the gage '19.- A right anglebracketl 27 is fixed to tliecabinet v17.near the lower end of the arm23, and is rovided with a horizontal slot inclosing t-he l) guiding samein its movement. The-said lower end is provided -with a contact point28, preferably of platinum, said pointbeing disposed contiguousto asimilar point 29, carried` by a suitable adjustablebarfor rod 30, saidrod being engaged by an adjusting set screw 31 for retaining same atvarious oints of longitudinal adjustment. -Tlie rod is also engaged by awire 32 oi" other suitable electrical conductor, which extends -.to the`post 33 of any .ordinary type of elec' 34. The opposite binding post 35binding trical cel of said cell is engaged by a wire or other suitableconductor 36, which extend to a binding )ost 37 of an electro-magnet 38,the opposite binding post 39 of said magnet being engaged by a wire orother suitable electrical con'- ductor 40, which extends to and engageswith the pivot of ,the arni- 23. The adjusting screw 41 is threadedthrough a bracket 42, arranged on the plate 21, contiguous to the owerYend of the arin for arni 23, and the said screw 41 preferably carl.ries a lock iiut`43, for retaining the screw at `various points ofadjustment.

At the opposite side of that arm 23, a lug 44, projects laterally fromthe plate 21, and prevents the arm from swinging too Vfar rearwardly.

It is -to be especially noted that inpractice the pivotal connection ofthe sleeve 24, with the arm 23, is as close to the pivotal support as itis practical tov make the saine, as thatJ the slightest movement of thesleeve 24, and

coi'inected parts, will )reduce a relatively great movement of' theIlower 'end of the arml 23, the set screw 41, being employed forcontrolling to a iiicety the amount* of movement iermitted, so that theelectrode 2S will not )e permitted to strike electrode 29 withsufficient l'orcc to do injury to either. rFlins any l'uctiiaiion inpressure in the gage 19 will quickly produce operation of the parts. [fthe pressure rises above the desired point thc expansion ol' the gage19, even to a very slight degree, will swing the arm 23 out ofthe lineof gi'avital l'orce sufficiently for produc,- ing contact of electrodes2S and 2S), and closjing" the circuit of the electro-magnet 38. WVhenthe pressure is reducedto normal,a re-v tract-ion of t-he gage 19 willpermit the arm l23 to bane its free end drop .by gravity-away from'electrode 29, and the contact is thus broken. ,A quick actingcontactmaking and breaking apparatus is thus provided, but the faction is notsuHiciently'quick to justify the employment of such apparatus forcontrol-1 ling` the circuit of solenoid'll, andthe saidapparatus'is'therefore employed asindicated forgoverning the localcircuit, and, as will be thereinafter fully specified, for controllingthe solenoid-'circuit bytcontrolling of' the local circuit.,y i Fixedtolthe cabinet 17,.above and at one side` of the electro-magnet 38, isasuitable bracket.45,ffwhich pivotally supports alever 46,the said levenbeing provided at one endwith the armature 47, sus ended above andcontiguous -to` oneend of t e core of' magnet 38. iThe lever 46 isguided in its movement ;l y .a.suitable guideffbracket 48, constructedsimilartobracket 27, but disposed vertically insteadof horijzontal. Theend'of the leverv l 46 beyondfiethe bracket'isvprovided with an `rangedcontiguous to a similar electrodeE 50, carriedbgr-a rod of bar51,#adjustablyen-AA gagfed by a setscrew 524 of any ordinary ty e; Therod 5 1 is engaged by a..wire or ot er suitable electricalcondctor 53,which ex- ,.:tendsJto one of.v the binding posts 16. .Elec- V. i tricwire, or other suitable conductor, 54,` engages` lthe arm 46. near theelectrode 49, and

extends to one pole or anysuitable battery,

o'r other source l'of .electric energy 55, the rvother pole of thebattery or other` source of .electric energy being engaged by a wire, orother suitable conductor, 56, extending to the other binding ost 16. I fl The operation oi) the parts w-ill be largely obvious, but yitmay bepointed out that '.wl'renl Athe local.l circuitis closedby the swingingof. tl'le'arm 23, through the expansion of the gage 19, .the magnetizingof lthe core omag-- net 38- will produce downward movement of J ,-thearfrna tl1re.47, which )reduce a sharp,`de cisive movement of theelectrode 49 into con.-l tact with the electrode 50.` .As soon as thecontact is made,y current Hows 'from battery 55, to cond} 1c tor576, tohelix 12, to conductor l,53,1 and tog rod 51 througlrthe contacting i*elcctrodestoconductor 54,. and back to bat.- tory,y The core 1 will bedrawn downwardly, with suilcient force for pullinggtlle Valve' to aclosed condition, and tbe jvnlve'will rc-v .main closeduntilthercductionin dral'l nvill V- "sullif-,iently reducey tlie;ternperatnre ol' the.' furnace ,lor lowerirh-tbe rassure .in thm boiler.to normal., atjwbicbftnne tbe gage lf), will'return to its formercondition and the contact'between thc elcrtrodes 28 and 211i will bebroken, 'llie armature 47 will thus l be released and the Contactbetween lthe electrodes 49 and 50 will be broken, releasing `thecore 10,and pernnttlng the the valve to its open condition.

It .will be observed that the magnet 3S proV1ded with a helix of lowresistance,'an`d spring to lift motive force from,l cell 34 may be ofllow potential, whilethat of batterv-55must be of comparatively 4highpotent The quickl i operation of the lever' 46 lshortens the durationofthesp'arkbetween'fthey contacts re- 'i gardless of the potenti alofthe'current inthe i circuit -iclosed' thereby:

ltively low amper'a'ge ofi the current from a- -single cell inithecircuiti 'closed by the arm insresrthat` there' willbe but) little,vsparking point offtheelectrbdes' or contacts 28 andze.

Aslseen in Ficsjlfand 4', 'I"})rovi(le fvalvcs G0/'and 61 wh'ric 1t-'areadapted toi positively :pressure'fof pipe -1. In

.at the control. the steam Fig. .4 it will be seenithat`a by-pass '62leads and extendsv to Sand communicates with `the y'p.ass 62 is providedwith a valve 613 "simi--v larfY 1n construction 4an(l';"`a`rran ementt-o passage of steam plessure througlrtlxc*by-- )rev llltly* -pipe 1,"but, said by-pass assi The bypass may be madey of any erred size and isillustrated as being slig smaller than` the lfrom the'pip'e 1 atlonelside of the valve 60 9'0 ipel lat apoint beyondthe valve 61. The

valves 60 and 61,'and adapted to control the;`

may, of' course,` if desired', be made/oi theV same size as pipe 1lsowas to be able trrpermit l'the passageof---thcI full head of steamwhen the'valves 60 and 61 are/closed and the `valve* 63 is open. Inpractice, I'ordinarilyopen the valve only tofasullicient extent lorlnsurmg they passage of. suliiclent steam rfor slowly operating the lnnengines rfbl`owors witliout-materially .alici-[ting the draft oranything occurto tbevalve Irwbicb makes `repairsnecessary,the valves 6()and 61 lnav.

be closed and the-Valve 63 opened to the full extent and -the parts loftinthis conditionf while the repairs arobeing made with rcs )ect to thevalve 3 or thc connected partsf. l bile* the repairs are being made,ol`.i-onrsc,-the

' valvef may be manually operated forlgov- `erningg, the dral'tapparatus*l'r)rcontrr-)lling lnorder to prevent tbc-moisture.of

rlvnsation from fallingnponparts ofthe-sw lenoid I-landin'jnringztl-iesame, I preferably proyid suitablebaiiles-64 andl-zarrangedi above llwaolenoid and disposed for receiving drippngsanddlroctmg tbe same beyond tbc parts o1' the solenoid which may bcinjured thereby.

In Figs.. 5 and 6, I have illustrated a modiiied forni of the valvecontrolling mechanism, in the said 'ligures the pipe 1 is provided witha valve casing 2^ cont .ining a valve 3, said parts being..constructedand arranged similar to the corresponding parts of the structure shownin Fig. 2. Valves 60 ,and 61 are also employed for the reason statedwith respect to valves (Sound 61, and the bypass 62 is arranged andadapted to operate in a manner simi ar toby-'pass 62, a suitable handvalve 63 being provided for controlling the steam passing throughby-pass 62. A valve stein 4 cngagestlie valve 3 and extends through anysuitable packing gland; A bracket or supporting frame 15 is connectedwith valve casing 3', and the stein 4. extends through the crossbracesof the i'ranie 15 and is surrounded by av spiiiig 5 which is .fixed atone end oi said cross brace'and extends downwardly to :andiixedlyengages a swivel block G6 which is aperturedior permitting iree passagetherethrough of the tube 67 which tube is -iixed to stein 4. The block66 is formed with a suitable annular -iiangexor r bead 6S,.secn in dotsin Fig. 5,

which bead engages a Ysuitable undercut annular groove in a iiut 69,which is threaded on 'to the tube 67. The stem 4 extends throughout thelength of the spring 5, and

pre

The solenoid 1l" is.supportcd by the arms ol" the bracket of frames l5',the said solenoid being constructed-and arranged similarly to .thesolenoid 11. The pipe 67 is iixed at its end opposite that engaged bythe nut 69 to the' coupling 70, and it `is thus apparent that when thenut 69 is rotated the -b ook 66 will be moved longitudinally oi" ste-m4and thel 'is possible toariange both on the saine side of the valve',the advantage ol this invention being present in any embodimentemploying' a spring and solenoid'acting against each other and beingarranged in axial aliiieiiient with the valve. f

The modified structure has the advantage of obviating the use of one ofthe packing glands, and eliminating. the friction occasioned thereby,but the balanced action in the modified structure is not as' 'perfectasthat in the structure having thc spring and solenoid on oppositesides'of the valve.,

Having thus fully described myinveiition,

what I claim/as new and desire to se fire ,by LettersPatent iszpi'occtsinto the pipe 67, the said steinby erence extending through the pipe andengaging a coupling 7() suitably connected. 'with the core 1 ()"ofa'solenoid 11.

circuit of the solenoi 1. In a pressure' governor, the combina- (i5Ation with a steam supply pipe and a balanced valve for governing theiiow therein, of an electro magnet connected with and adapted to actuatesaid valve, a main circuit for said magnet, a pivoted arm interposed insaid cir- 70 cuit and disposed substantiallyhorizontally andoverbalanced on its pivot for retaining the circuit normally open, anelectro magnet for swinging said arm upon its pivot for closinir saidcircuit, a local circuit for said second mentioned electro magnet, arelatively long pendent arm interposed in the local circuit and pivotedatits upper end in position for hanging normally in the line ofgravitation and adapted to swine' upon its pivot out of 80 such line formaking tlie said local circuit and to swing back tosaid line forbreaking said circuit, and a gage connected to said endent armsubstantially at its upper end an adaptedfor swinging the arm out of theline-of gravitation relative to the pressure in said steam pipes'upply.L

2. In a press'. re governor, the-coinbina 'tion with a pressure supplypipe and a valve for governing the flow therein, of a spring connectedwith said valve Vfor retaining the .saine normally in' anopeiicondition, means .adjustably supporting said. spring for varying thetension thereofya solenoid for moving said valve in a directionopposingv the 95 pressure of the spring, the core .of said solenoidbeing formed in sections,4 meansfor adjusting one of said sections forvarying the degree ofpull of the solenoid-independently' of thc spring,anda '3. I n a pressure governor, the combina-4v tion with a steamsupply pipe anda valve foigoverniiig the ilowtlierein, ofan electromagnet ,of relatively high'resistance for 'ac- '105 tuating said valve,a main circuit for said magnet, apivoted arm interposed in said circuitaiiddisposed substantially horizontal 'andadapted to have one of itsends swunr vertically for opening and closing tlie sai i10- iiiaiiicircuit, .an armature` connected with i said ariii, an electroniagnetadaptedto operate said armature for swinging said arinfor,lclosing the said. Imain circuit,v`a local `circuit i for said secondmentioned electro magnet, a relatively lone pendent arm' pivotedl at its-upper end and adapted to be swung upon its pivot for-breaking andmaking the said locaz circuit at its lower end, the `said relativelyrlon .pendent-arm being suspended nor; tally 12:1)v

in t e ,lineolgravitation and when so suspendedl retaining the localcircui-tinav broken condition,` and a .gage connected with the' j 4saidpendenti` arm Ycontiguous 7to the pivot thereof for swinging' the arm'relativeto the 12a .pressure in said steam supply pipe.

" ,4. In a pressuregovernor, the combinal y tion with-a steam' pipeand avalve forgov'- gage for controlling the i00.-

f @eef/12 5 erning the flow theieiu, of e spring Connected with saidvalve for normally retaining the l same in an open condition, aslenoie'. lnwing its helix fixed with respect to the valve and its coreconnected to the valve, means for varying the tensin` of said spring'independenbly of the solenoid, .mesme independent of the springadjustable. within the helix: for vsil i rying the-pull of said core,and a gage for governii'ig the cileuit 0f said helix. i0

In testnnony whereof I aflix my signature in the presence of twoWitnesses.

l WILLIAM MCCI'JAVE. n Witnesses:

C. Pi SMITH,

E. WHITMQRE.

